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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2000,2002-2005 Silicon Graphics, Inc.
* All Rights Reserved.
*/
#ifndef __XFS_BMAP_BTREE_H__
#define __XFS_BMAP_BTREE_H__
struct xfs_btree_cur;
struct xfs_btree_block;
struct xfs_mount;
struct xfs_inode;
struct xfs_trans;
struct xbtree_ifakeroot;
/*
* Maximum number of bmap btree levels.
*/
#define XFS_BM_MAXLEVELS(mp,w) ((mp)->m_bm_maxlevels[(w)])
/*
* Prototypes for xfs_bmap.c to call.
*/
extern void xfs_bmdr_to_bmbt(struct xfs_inode *, xfs_bmdr_block_t *, int,
struct xfs_btree_block *, int);
void xfs_bmbt_disk_set_all(struct xfs_bmbt_rec *r, struct xfs_bmbt_irec *s);
extern xfs_filblks_t xfs_bmbt_disk_get_blockcount(xfs_bmbt_rec_t *r);
extern xfs_fileoff_t xfs_bmbt_disk_get_startoff(xfs_bmbt_rec_t *r);
extern void xfs_bmbt_disk_get_all(const struct xfs_bmbt_rec *r,
struct xfs_bmbt_irec *s);
extern void xfs_bmbt_to_bmdr(struct xfs_mount *, struct xfs_btree_block *, int,
xfs_bmdr_block_t *, int);
extern int xfs_bmbt_get_maxrecs(struct xfs_btree_cur *, int level);
extern int xfs_bmdr_maxrecs(int blocklen, int leaf);
extern int xfs_bmbt_maxrecs(struct xfs_mount *, int blocklen, int leaf);
extern int xfs_bmbt_change_owner(struct xfs_trans *tp, struct xfs_inode *ip,
int whichfork, xfs_ino_t new_owner,
struct list_head *buffer_list);
extern struct xfs_btree_cur *xfs_bmbt_init_cursor(struct xfs_mount *,
struct xfs_trans *, struct xfs_inode *, int);
struct xfs_btree_cur *xfs_bmbt_stage_cursor(struct xfs_mount *mp,
struct xfs_inode *ip, struct xbtree_ifakeroot *ifake);
void xfs_bmbt_commit_staged_btree(struct xfs_btree_cur *cur,
struct xfs_trans *tp, int whichfork);
extern unsigned long long xfs_bmbt_calc_size(struct xfs_mount *mp,
unsigned long long len);
/*
* Btree block header size depends on a superblock flag.
*/
static inline size_t
xfs_bmbt_block_len(struct xfs_mount *mp)
{
return xfs_sb_version_hascrc(&mp->m_sb) ?
XFS_BTREE_LBLOCK_CRC_LEN : XFS_BTREE_LBLOCK_LEN;
}
/* Addresses of key, pointers, and records within an incore bmbt block. */
static inline struct xfs_bmbt_rec *
xfs_bmbt_rec_addr(
struct xfs_mount *mp,
struct xfs_btree_block *block,
unsigned int index)
{
return (struct xfs_bmbt_rec *)
((char *)block + xfs_bmbt_block_len(mp) +
(index - 1) * sizeof(struct xfs_bmbt_rec));
}
static inline struct xfs_bmbt_key *
xfs_bmbt_key_addr(
struct xfs_mount *mp,
struct xfs_btree_block *block,
unsigned int index)
{
return (struct xfs_bmbt_key *)
((char *)block + xfs_bmbt_block_len(mp) +
(index - 1) * sizeof(struct xfs_bmbt_key *));
}
static inline xfs_bmbt_ptr_t *
xfs_bmbt_ptr_addr(
struct xfs_mount *mp,
struct xfs_btree_block *block,
unsigned int index,
unsigned int maxrecs)
{
return (xfs_bmbt_ptr_t *)
((char *)block + xfs_bmbt_block_len(mp) +
maxrecs * sizeof(struct xfs_bmbt_key) +
(index - 1) * sizeof(xfs_bmbt_ptr_t));
}
/* Addresses of key, pointers, and records within an ondisk bmbt block. */
static inline struct xfs_bmbt_rec *
xfs_bmdr_rec_addr(
struct xfs_bmdr_block *block,
unsigned int index)
{
return (struct xfs_bmbt_rec *)
((char *)(block + 1) +
(index - 1) * sizeof(struct xfs_bmbt_rec));
}
static inline struct xfs_bmbt_key *
xfs_bmdr_key_addr(
struct xfs_bmdr_block *block,
unsigned int index)
{
return (struct xfs_bmbt_key *)
((char *)(block + 1) +
(index - 1) * sizeof(struct xfs_bmbt_key));
}
static inline xfs_bmbt_ptr_t *
xfs_bmdr_ptr_addr(
struct xfs_bmdr_block *block,
unsigned int index,
unsigned int maxrecs)
{
return (xfs_bmbt_ptr_t *)
((char *)(block + 1) +
maxrecs * sizeof(struct xfs_bmbt_key) +
(index - 1) * sizeof(xfs_bmbt_ptr_t));
}
/*
* Address of pointers within the incore btree root.
*
* These are to be used when we know the size of the block and
* we don't have a cursor.
*/
static inline xfs_bmbt_ptr_t *
xfs_bmap_broot_ptr_addr(
struct xfs_mount *mp,
struct xfs_btree_block *bb,
unsigned int i,
unsigned int sz)
{
return xfs_bmbt_ptr_addr(mp, bb, i, xfs_bmbt_maxrecs(mp, sz, 0));
}
/*
* Compute the space required for the incore btree root containing the given
* number of records.
*/
static inline size_t
xfs_bmap_broot_space_calc(
struct xfs_mount *mp,
unsigned int nrecs)
{
/*
* If the bmbt root block is empty, we should be converting the fork
* to extents format. Hence, the size is zero.
*/
if (nrecs == 0)
return 0;
return xfs_bmbt_block_len(mp) + \
(nrecs * (sizeof(struct xfs_bmbt_key) + sizeof(xfs_bmbt_ptr_t)));
}
/*
* Compute the space required for the incore btree root given the ondisk
* btree root block.
*/
static inline size_t
xfs_bmap_broot_space(
struct xfs_mount *mp,
struct xfs_bmdr_block *bb)
{
return xfs_bmap_broot_space_calc(mp, be16_to_cpu(bb->bb_numrecs));
}
/* Compute the space required for the ondisk root block. */
static inline size_t
xfs_bmdr_space_calc(unsigned int nrecs)
{
return sizeof(struct xfs_bmdr_block) +
(nrecs * (sizeof(struct xfs_bmbt_key) + sizeof(xfs_bmbt_ptr_t)));
}
/*
* Compute the space required for the ondisk root block given an incore root
* block.
*/
static inline size_t
xfs_bmap_bmdr_space(struct xfs_btree_block *bb)
{
return xfs_bmdr_space_calc(be16_to_cpu(bb->bb_numrecs));
}
void xfs_bmbt_iroot_alloc(struct xfs_inode *ip, int whichfork);
#endif /* __XFS_BMAP_BTREE_H__ */
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